About this role
Salary: £50,000 - 80,000 per year
Requirements: At least 5 years of experience in an IT Systems, Network Administration, or similar infrastructure-focused role.Proven, hands-on experience managing SonicWall firewalls, including configuration, VPNs, policies, and troubleshooting.Strong working knowledge of VMware ESXi / vSphere.Excellent troubleshooting skills across desktop, server, and network environments.Experience with Windows Server and Active Directory.A proactive approach to identifying and resolving technical issues.Strong problem-solving skills and the ability to take ownership of issues through to resolution.Excellent communication skills and a customer-focused approach.The ability to work independently, prioritise workload, and operate effectively in a busy environment.Relevant IT certifications such as SonicWall CSSA, VMware VCP, CompTIA Network+/Security+, or Microsoft certifications are desirable.Experience supporting multi-site or international environments is desirable.Knowledge of PowerShell or other scripting is desirable.Experience with IT infrastructure monitoring tools is desirable.Previous experience working within a busy operational or depot-based environment is desirable. Responsibilities: Configure, manage, and maintain SonicWall firewalls, including security policies, access rules, NAT, VPN, and content filtering.Monitor firewall logs and network traffic to identify and respond to potential security threats.Carry out firmware upgrades, configuration backups, and security hardening.Troubleshoot network connectivity and security issues.Administer and maintain VMware ESXi/vSphere hosts and virtual machines.Provision virtual machines and manage resource allocation and performance.Manage snapshots, backups, migrations, and capacity planning.Monitor the health, availability, and performance of the virtual infrastructure.Support patching and ongoing infrastructure improvements.Provide 1st and 2nd line technical support to users across hardware, software, network, and connectivity issues.Investigate and resolve support tickets efficiently and professionally.Provide a high level of customer service to internal users.Document incidents, solutions, and standard operating procedures.Support Windows Server, Active Directory, and associated services.Assist with backup, disaster recovery, and business continuity processes.Work with external IT vendors and service providers to resolve technical issues.Support IT procurement and infrastructure projects where required. Technologies: Active DirectoryFirewallFirmwareHardwareSupportNATNetworkPowerShellSecurityVPNVMwareWindows More:
We are looking for an experienced and hands-on IT Systems & Network Administrator to join our IT team in Heathrow. This is a fully office/depot-based role with no remote working, offering a salary of £50,000 to £80,000 depending on experience. You will play a key part in the day-to-day operation, maintenance, security, and troubleshooting of our IT infrastructure, with a strong focus on SonicWall firewalls and VMware ESXi/vSphere.
last updated 34 week of 2026